Adding to the one above,
Keep food or drinks away from the camera
Use Pangu 9.2 iOS jailbreak installer.
1. get the Pagnu 9.2 installer
2. connect your iOS 9.2 device to your Windows/OS X machine via universal serial bus cord
3. go through with the setup wizard
A time signal will do that, I believe!
Answer:
Many websites these days have done it for you, (Wix, Squarespace ect.)
If you want to start from scratch however, then I believe you do, I have only researched these websites which do it for you.
Hope this helped :)